A data network is a system designed to transfer data from one network access point to one other or more network access points via data switching, transmission lines, and system controls. Data networks consist of communication systems such as circuit switches, leased lines, and packet switching networks.

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5 components of data communication network

• Data.
• Sender.
• Receiver.
• Transmission Medium.
• Protocol.

Components or Elements of a Data Communication:

• Message.
• Sender.
• Receiver.
• Medium (Communication Channel)
• Encoder & Decoder.

For example, a common example of data communications is a computer connected to the Internet via a Wi-Fi connection, which uses a wireless medium to send and receive data from one or more remote servers. It means that the data is packaged into units, and then sent serially to the receiver by the sender.

The main objective of data communication and networking is to enable seamless exchange of data between any two points in the world. This exchange of data takes place over a computer network. Data refers to the raw facts that are collected while information refers to processed data that enables us to take decisions.

Data Communications is the transfer of data or information between a source and a receiver. The source transmits the data and the receiver receives it. The actual generation of the information is not part of Data Communications nor is the resulting action of the information at the receiver.

The 3 Modes of Data Communication

• Simplex: Data travels in one direction (from A to B).
• Half-duplex: Data travels in one direction (from A to B) and then the other direction (from B to A) but not at the same time.
• Full-duplex: Data can travel in both directions at the same time.

There are five important components in every Data Communication system . They are (i)Messages (ii)Sender (iii)Receiver (iv)Medium and (v)Protocols. Message: The message is the data information to be communicated. It can be either text, numbers or audio or video or any combination of these types.

Data communication refers to the exchange of data between a source and a receiver via form of transmission media such as a wire cable. Data communication is said to be local if communicating devices are in the same building or a similarly restricted geographical area.

Message: The message is the transmission (data) to be communicated. It can consist of text, number, pictures, sound, or video or any combination of these. Protocol: A protocol is a set of rules that governs data communication. It represents an agreement between the communicating devices.

Data communications are the exchange of data between two devices via some form of transmission medium such as a wire cable. The effectiveness of a data communications system depends on four fundamental characteristics: delivery, accuracy, timeliness, and jitter.

Explain data communication process with the help of a diagram. Owlgen. Data communication refers to the exchange of data between a source and a receiver. Data communication is said to be local if communicating devices are in the same building or a similarly restricted geographical area.

The effectiveness of a data communications system depends on four fundamental characteristics: delivery, accuracy, timeliness, and jitter….

• Delivery: The system must deliver data to the correct destination.
• Accuracy: The system must deliver the data accurately.
• Timeliness:
• Jitter:

The block diagram of a communication system will have five blocks, including the information source, transmitter, channel, receiver and destination blocks. The information source converts this information into physical quantity.

We communicate for a variety of reasons! We use communication to share information, comment, ask questions, express wants and needs, develop social relationships, social etiquette, etc.

An example of a full-duplex device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. The earphone reproduces the speech of the remote party as the microphone transmits the speech of the local party.

Examples of simplex include radio broadcasting, television broadcasting, computer to printer communication, and keyboard to computer connections. Information can be broadcast in both directions in a simplex circuit, but not at the same time, like a duplex. Another term for simplex is half-duplex.

The simplex mode can use the entire capacity of the channel to send data in one direction. Example: Keyboard and traditional monitors. The keyboard can only introduce input, the monitor can only give the output. In half-duplex mode, each station can both transmit and receive, but not at the same time.

Key Differences of the Three Transmission Modes In simplex mode, the signal is sent in one direction. In half duplex mode, the signal is sent in both directions, but one at a time. In full duplex mode, the signal is sent in both directions at the same time. In simplex mode, only one device can transmit the signal.